Clamp for hose or compressible tubing



Jan. 13, 1931. R. w. M ESRlEN CLAMP FOR HOSE OR COMPRESSIBLE TUBING Filed June 10, 1929 rroavzz Patented Jan. 13, 1931 Y UNITED. sm rr.

ROGER w. MCBR'IEN, or elrroliiipi lnois CLAMP ron HOSE on conrmissiienn, TUBING Application filed June 10,

scribed and claimed.

The principal object of the invention is to provide a spring clamp for pressing to gether the walls of the tubing and thus constricting the same when not in use, and at 30 the same time hold thetubing against move-,

ment away from the most effective part of the clamp. The manner of accomplishing this object, together with other advantages inherent in the device, will be better apparent from a detailed description of the invention in connection with the accompanyingdrawings, in which:

Figure 1 is an elevational view of a commonly used chemical apparatus embodying a hose connection on whichmy improved clamp is positioned; Fig. 2 is a side elevation of the clamp; Fig. 3 is a combined plan and horizontal section taken on the line 33 of Fig. 2; and Fig. 4 is a cross sectional detail taken on the line 47-4: of Fig. 2.

Referring to the drawings, B represents a bottle containing a liquid chemical, which it is desired to use in a titration operation for which purpose a burette b is provided. The refilling neck n of the burette is connected to tubing 25 by a piece of rubber hose h and the upper end 6 of the tubing is disposed in the bottle B; A vent tube 4; is

' provided to permit. the entry .of air into the bottle B, as is well understood in the art,

Obviously, the communication between the bottle B and the burette b is closed off at all times, except when it is necessary to refill the burette from the bottle, and in order that the flow of liquid to the burette may be con By referring to Fig. 3 it will be seen that the'clamp O consists of a circular spring portion from which a pair of clamp arms 2, 2

extend. The arm 2 terminates in a laterally I bent finger 3, and the arm 2 terminates in a laterally bent finger 3, said "fingers cross- 1929. semi No. 3 9,754.

ing each'other and the finger 3 being slotted so asto allow finger 3jto traverse it. On

the ends of fingers 3, 3 there are discs 4, 4

to facilitate the pressing together'of the fingers by the operator for the purpose of spreadingopenthe clamp arms 2, 2 to release the pressure'on the tube II, when it is desired to permit thefiow of liquid from the bottle B to the burette b. A sleeve 5 is mounted on the arms 2, 2, said arms traversing slots 3 and 7 in opposed relation. When the sleeve s in its most effective position in close proximity to the ring l, and the hose clamped within it, there is a small amount of clearance between clamp arms 2,2 and the ends of slots 6 and 7. Therefore, it is 'possible for the arms 2, 2 to be spread apart sufficiently to open; the hoseh for the purpose of allowing the liquidto pass through. However, the sleeve 5 will not allow the arms; 2, 2 to be spread to such an extent asto-entirely freethe-hose, but on the otherhand, will always retain'a sufiicient grip on the hose to prevent its, sliding back and forth between the clamp arms 2, 2. It will be observed that the arms 2, 2 are inclined relatively to each other and every time the clamp is 0perated to spread these arms, there will be a wedging-action on the sleeve 5 to force it inwardly toward the ring 1. Thus it is practically impossible for the hoseh to work outwardly where the pressure-exerted on itby the arms 2, 2 is notsuflicient'to hold it closed.

In the types of clamp now in use, the hose k may movefreely when clamp arms are spread to unclamp it, and it often happens that the hose moves to aposition adjacent to the fingers corresponding to fingers 3, 3",.v V

where there is not sufficient pressure to constrict it. Obviously, this defect causes considcrable annoyance and often results in spoiling a test that must be performed with great accuracy.

Having described my invention, I claim:

1. Aclainp of the character described comprising a pair of clamp arms adapted'to re- CQUTG betweenthem the object clamped, a-

spring connection between said arms for holding them in clamping pos tion, said arms diverglng from saldconnectlon, and a collar 7 slidablymounted on said arms; the arms traversing oppositely disposed slots in said collar.

' signature.

2. A clamp ofthe character described com- -,prising a pair of clamp arms adapted to i grip the object clamped, a spring connection at one end of said'arms, means disposed on said arms for limiting the degree of separation thereof, said means cooperating with the object gripped to prevent'accidental displacement thereof and terminal {fingers on the arms adapted to be pressed together for releasing the object fromthe grip ofthe arms.

In testimony whereof I hereunto aflix my ROGER MoBRIEN. 

